SAPPHIRE BLUE 



of t\\v. trur shade is to be found in the popularly named "False Sapphire'* 

 or CYANITE from the far-famed St. Gothard. A trip by our collector 

 and considerable work done for us yielded some Rui)erb specimens. This 

 locality has been known for over half a century, but like many others in 

 Switzerland, is quite unworkable, save during two months of the year, and 

 rarely visited even then. Thus the specimens are not ne\v — ju- ipe- 



rior to those in the large museums, all of wlUch have the early ."j !»ut 



are fast replacing them with the later ones. 



Mouths of expert work were devoted to the careful removal of the Para- 

 gonite matrix, exposing the transparent blue crystals associated with Instroos 

 dark brown Staurolites, often in parallel and penetrating babit«. This is 

 mentioned in some of the mineralogies, which likewise add "rarely termi- 

 nated." Yet we have perfectly terminated Cyanites six inches long, pene- 

 trating the length of a Staurolite. This peculiarity, together with the 

 contrasting blues and browns standing out on the pearly background, affordB 

 one of the most striking combinations to be seen in any collection. 



The stock of really fine specimens is limited and rapidly dimiuishir 

 to $15.00. 



Detached Crystals, 2oc. per dozen to $1.00 each. 



Terminated Crystals, 50c. to ^2.00 t^m-h. 



OTHER SWISS MINERALS. 



We secured by exchange the few dujilicates left in uue of the oldest of 

 European collections. Among them were the following historical things of 



high value: Eisenrose, Sphene, Octahedr'' " ■ '■' i- .*. t ...#.#^ 



Green Fluor, Smoky (Quartz, etc., etc. 



EDUCATIONAL COLLECTIONS. 



For 26 years we have supplied mining 8cht>ol8. univerwities, coliegee and 

 secondary schools throughout the world with mineralogical material. Dur- 

 ing that period the quality of our elementary and advanced collections has 

 steadily improved, so that to-day the highest grade of study sjH'cimens are 

 offered at unprecedentedly low prices. An insp»K?tion of our I^aboratory 

 List will show that Euri»pean minerals are s«)ld not simply Ih'Iow American 

 prices, but oftnn at lower rates than prevail in Eurojx'. The wide connec- 

 tions of our European house alone permit this economy to the consumer, 

 our prices being the same on iKith sides of the Atlantic. If in Paris this 

 summer favor \\b with a call— 15 minutee from the Opera Quartrr. 



llliiNtriitrd C«>lleolloii Ciiliilog Freo. 



II,. I ni,'.-^t and M(mt CouipU'te Stock of Scientitic and Educatit»nal Minerals 

 II the World. Highest Awanls at Nine Expositions. 



roRMKKLY Un \ 1 , JoMii . 



PHILADELPHIA. PARIS, 



1817 Arch Ktr. < H Kae da CiiaBip d» Mart. 



